you are most welcome to Erbil.
you can hire a small flat for about 1000 or even more, you can drive in Erbil, there are bars, nightclubs especially in Ainkawa a small town where the christian minorities live, or you can find bars in the hotels.
It is safe to outside in the north, Erbil, suleimaniya, Dohuk, but there are no nocuturnal activities and most of the shopping centers are closed down by 11 or 12.